Kelly Slater has been so successful as a pro surfer that he is practically synonymous with the sport for those who aren't hardcore followers. He's the youngest (20) and oldest (39) to win the Association of Surfing Professionals World Tour championship and has also crossed over to enjoy mainstream exposure such as appearing on Baywatch and jamming on stage with his friend Eddie Vedder of Pearl Jam.

HBO's "Real Sports" takes a closer look at his life in the latest edition of the show that premieres 10 p.m. ET/PT Tuesday. Here is a snippet that also gives you a view what Slater sees under the waves:

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